movieexporter.h

/*

Pencil - Traditional Animation Software
Copyright (C) 2012-2017 Matthew Chiawen Chang

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; version 2 of the License.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

*/

#ifndef MOVIEEXPORTER_H
#define MOVIEEXPORTER_H

#include <functional>
#include <QString>
#include <QSize>
#include <QTemporaryDir>
#include "pencilerror.h"

class Object;

struct ExportMovieDesc
{
    QString strFileName;
    int     startFrame = 0;
    int     endFrame   = 0;
    //int     videoFps   = 30;
    int     fps        = 12;
    QSize   exportSize{ 0, 0 };
    QString strCameraName;
};

class MovieExporter
{
public:
    MovieExporter();
    ~MovieExporter();
    
    Status run( const Object* obj, 
                const ExportMovieDesc& desc, 
                std::function<void(float)> progress );
    QString error();

    void cancel() { mCanceled = true; }

private:
    Status assembleAudio( const Object* obj, QString ffmpegPath, std::function<void( float )> progress );
    Status generateImageSequence( const Object* obj, std::function<void(float)> progress );
    Status combineVideoAndAudio( QString ffmpegPath, QString strOutputFile );

    Status twoPassEncoding( QString ffmpeg, QString strOutputFile );
    Status convertVideoAgain( QString ffmpeg, QString strIn, QString strOut );
    Status convertToGif( QString ffmpeg, QString strIn, QString strOut );

    Status executeFFMpegCommand( QString strCmd );
    Status checkInputParameters( const ExportMovieDesc&  );

    QTemporaryDir mTempDir;
    QString mTempWorkDir;
    ExportMovieDesc mDesc;
    bool mCanceled = false;
};

#endif // MOVIEEXPORTER_H